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穆棱东北红豆杉林25公顷监测样地建于2014年,地理位置43.95 ºN 130.07 ºE。样地地形走势西南高,西北、东北低,海拨最高为781 m,最低为658 m,高差123 m;年平均温度在-2℃,年平均降水量530 mm

穆棱东北红豆杉林25公顷监测样地内森林群落优势种明显,垂直层次复杂,是典型的中龄复层异龄林,其主要建群树种为紫椴、红松、色木槭、臭冷杉、枫桦等,样地内共有胸径(DBH)≥1cm木本植物57种,隶属于2238属。独立个体数为63,877株(包括分枝为126,573株),平均胸径为7.83 cm,胸高断面积26.4 m2/hm2

样地内东北红豆杉(国家一级保护植物)重要值1.49%,排名21位,径级结构近似于正态型,在35 cm DBH < 38cm出现峰值,而后又递减,平均胸径39.42 cm,最大达到89.0 cm,个体主要分布在大径级上,但因个体数量较少,其胸高断面积仅为(0.93 m2/hm2),占总胸高断面积(26.4 m2/hm2)的3.6%

 

A 25-ha Taxus cuspidata forest plot was established in Muling Nature eserve in  2014, with the geographical coordinate 43.95 °N, 130.07 °N. The altitude varies from 658 m to 781 m, with a maximum altitude difference of 123m. The mean annual temperature is -2, and mean annual precipitation is 530 mm.

The Taxus cuspidata forest plot is a typical middle-aged multi-storied uneven aged forest with obvious dominant species. The main constructive species include Tilia amurensis, Pinus koraiensis, Acer mono, Abies nephrolepis and Betula costata etc. 63,877 individuals (126,573 individuals including branches at ground surface) with DBH 1 cm were recorded, belonging to 22 families, 38 genera and 57 woody species. The mean DBH and basal area were 7.83 cm and 26.4 m2/hm2 respectively.

The importance value of Taxus cuspidata (Category I national protected species) is 1.49% and ranked 21. The DBH distribution of all individuals showed a reversed “J” type, and the peak of DBH was between 35 cm and 38 cm. The mean DBH was 39.42 cm, and the maximum DBH is 89.0 cm. The percentage of the basal area (0.93 m2/hm2) was 3.6% of total basal area26.4 m2/hm2by less numbers.

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